Collective Detection of Potentially Harmful Requests Directed at Web Sites

The number of web-based activities and websites is growing every day. Unfortunately, so is cyber-crime. Every day, new vulnerabilities are reported and the number of automated attacks is constantly rising. Typical signature-based methods rely on expert knowledge and the distribution of updated information to the clients (e.g. anti-virus software) and require more effort to keep the systems up to date. At the same time, they do not protect against the newest (e.g. zero-day) threats. In this article, a new method is proposed, whereas cooperating systems analyze incoming requests, identify potential threats and present them to other peers. Each host can then utilize the findings of the other peers to identify harmful requests, making the whole system of cooperating servers “remember” and share information about the threats.